CN1540035A - Technique for producing multifunctional aluminum base flexible shielding material - Google Patents
Technique for producing multifunctional aluminum base flexible shielding material Download PDFInfo
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- CN1540035A CN1540035A CNA2003101022457A CN200310102245A CN1540035A CN 1540035 A CN1540035 A CN 1540035A CN A2003101022457 A CNA2003101022457 A CN A2003101022457A CN 200310102245 A CN200310102245 A CN 200310102245A CN 1540035 A CN1540035 A CN 1540035A
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- 239000000463 material Substances 0.000 title claims abstract description 69
- 229910052782 aluminium Inorganic materials 0.000 title claims description 42
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims description 42
- 238000000034 method Methods 0.000 title description 15
- 238000005406 washing Methods 0.000 claims abstract description 40
- 238000007747 plating Methods 0.000 claims abstract description 28
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 27
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 15
- 239000010949 copper Substances 0.000 claims abstract description 15
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- 239000004411 aluminium Substances 0.000 claims description 34
- 239000007788 liquid Substances 0.000 claims description 24
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000005516 engineering process Methods 0.000 claims description 13
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 10
- 239000005030 aluminium foil Substances 0.000 claims description 10
- 229910052725 zinc Inorganic materials 0.000 claims description 10
- 239000011701 zinc Substances 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 9
- 238000009713 electroplating Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 230000008020 evaporation Effects 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims description 2
- 229910001004 magnetic alloy Inorganic materials 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 239000002131 composite material Substances 0.000 claims 2
- 229910052751 metal Inorganic materials 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 10
- 239000000758 substrate Substances 0.000 abstract description 4
- 230000005684 electric field Effects 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 4
- 229910002555 FeNi Inorganic materials 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000002585 base Substances 0.000 abstract 1
- 230000005672 electromagnetic field Effects 0.000 abstract 1
- 239000011888 foil Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 13
- 239000004744 fabric Substances 0.000 description 11
- 238000010301 surface-oxidation reaction Methods 0.000 description 8
- 238000007772 electroless plating Methods 0.000 description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 5
- 238000002203 pretreatment Methods 0.000 description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
A multifunctional flexible Al-base shielding material for shielding HF electromagnetic field, electric field, LF magnetic field, visual light and infrared light is prepared through evaporating an Al film or sticking an Al foil onto a flexible substrate, ultrasonic or alkali solution treating for removing oil, water washing, removing oxidized surface layer in the solution of sodium hydroxide, water washing, displacing to form a metal layer on Al film, water washing, plating copper and/or nickel, plating magnetic FeNi alloy and water washing.
Description
Technical field
The present invention is a kind of multi-functional aluminum-base flexible shielding material technology of preparing, and its product is applicable to high-frequency electromagnetic shielding, electric field shielding, low frequency magnetic shielding field, and visible light reflects, ir radiation reflection field.
Background technology
Along with the develop rapidly of electronic technology and information industry, the electronics and the product that use in people's production and the life are more and more.And most electronic product such as dielectric heating oven, microwave generator, computer, air-conditioning, refrigerator, electric blanket and electric wire, radar etc. all can produce electromagnetic radiation to some extent.Electromagnetic radiation not only causes the phase mutual interference between the electronic product, and pollutes human living space, the health of harm humans.Simultaneously, in modern military, Electromagnetic Interference and counter-jamming and military affairs are divulged a secret and are protected, and all these is developed rapidly the electromagnetic protection material, by unremitting research, exploitation, thereby have constantly solved the problem of being brought.
At present, have the electromagnetic shielding material of certain flexibility, have following three kinds: first steel fiber and man-made fiber mix spun conductive fabric, but the comprehensive shielded usefulness of this conductive fabric is not high; It two is to brush electrically conducting coating on fabric, and this fabric specific conductivity is little, and comprehensive shielded usefulness is relatively poor; It three is to utilize chemical plating method to plate layer of metal and then metal lining on fabric, the comprehensive shielded usefulness of this fabric is higher, but following drawback is arranged: the pre-treatment process of (1) electroless plating is loaded down with trivial details, complicated, and pretreatment liquid lost efficacy the bad control of technology easily; (2) self-decomposition easily takes place in chemical plating fluid, occurs the phenomenon that plating is inhomogeneous or plating is not gone up simultaneously easily; (3) Fu Za pre-treatment process and electroless plating process unavoidably pollute environment; (4) cost of this fabric shielding material is higher, and every construction cost per square meter reaches about 80 yuan.Simultaneously, have directly with aluminium sheet as shielding material, but because oxide film---Al appears in aluminium surface inevitably
2O
3So, influenced the electroconductibility of material monolithic, thereby influenced effectiveness of shielding, and in use the aluminium surface is easy to be corroded in environment, thereby it is ageing relatively poor.
With the aluminium film both at home and abroad also beyond example, when guaranteeing very high effectiveness of shielding, overcome the defective that above different materials is mentioned, and overcome the function singleness of product in the past as the substrate preparation shielding material.
Summary of the invention
The object of the present invention is to provide a kind of multi-functional aluminum-base flexible shielding material technology of preparing, it can overcome above weak point, when reaching very high comprehensive shielded usefulness, save loaded down with trivial details, complicated electroless plating pre-treatment process and electroless plating process, thereby simplification technological process, reduce cost, reduce and pollute; Simultaneously, the present invention has wideband section multifunctionality, has overcome the function singleness of product in the past.
The invention provides a kind of multi-functional aluminum-base flexible shielding material technology of preparing, it is characterized in that it may further comprise the steps:
(1) evaporation layer of aluminum on the flexible materials or paste the rolling aluminium foil of one deck below 40 microns as base material or directly with the rolling aluminium foil below 40 microns as base material;
(2) above-mentioned base material is reached oil removal treatment after washing in alkaline wash by the ultrasonic oil removing of prior art;
(3) base material after the above-mentioned oil removing washing is put into soda lye and handle, remove the oxide film after washing on surface;
(4) base material after the washing of above-mentioned removal surface film oxide is handled or put into the heavy copper liquid of alkalescence and handle or put into the heavy nickel liquid of alkalescence and handle soaking zinc, at its aluminium film upper surface displacement last layer metallic membrane after washing;
(5) material after the above-mentioned displacement last layer metallic membrane washing being put into copper plating bath handles, putting into nickel-plating liquid again handles, or directly put into nickel-plating liquid and handle, then after copper plating bath or nickel-plating liquid processing, the electroplating iron-nickel magneticalloy, or the Direct Electroplating Anhyster, washing has obtained multi-functional aluminum-base flexible shielding material then.
Step of the present invention (1) flexible materials can be overlay, fabric, felt etc.;
Base material after step (3) washing is handled the oxide film of removing the surface under the following conditions: adopt the aluminium film with good flexibility below 40 microns, its processing requirements is different from aluminium sheet.Base material after the washing is put into the soda lye of pH=9～13, handles 30～150 seconds, removes the oxide compound (Al of aluminium film surface
2O
3); The pH value is less than this scope, and then oxide film is difficult to remove, and the pH value then is easy to aluminium film part is dissolved fully greater than this scope.Treatment time is too short, and then oxide film is difficult for eliminating, and the treatment time is oversize, and then local all dissolvings can appear in the aluminium film.This deoxidation film step is to guarantee to have the precondition of good adhesion between next step displacement layer and the aluminum substrate, so will control the length in big or small and treatment time of pH value well.
Base material after step (4) washing soaks zinc to be handled or puts into the heavy copper liquid of alkalescence and handle or put into the heavy nickel liquid of alkalescence and handle, displacement one deck tack good metal film on its aluminium film, and strict simultaneously control pH=10～14 and treatment time are 50～200 seconds.When guaranteeing that the pH value of solution value is in alkaline range, pH can not be too high, and the too high crystallographic property that then influences the metathetical metallic membrane of pH makes displacement layer coarse, has reduced the bonding force and the anti-corrosion performance of displacement layer and aluminum substrate.During displacement, it is very fast just to have begun displacement, and rear substitution slowed down in 50 seconds, surpasses 200 seconds, and displacement layer worsens on the contrary, so time swap was controlled at below 200 seconds.Thereby guarantee the quality of displacement layer and the tack between displacement layer and the matrix.
Base material after step (5) washing can be anode with the copper material, is negative electrode with the material of handling, under direct current or pulsed electrical, carry out metal lining copper, being anode, be negative electrode again, under direct current or pulsed electrical, carry out metal lining nickel with the material of handling with nickel plate or inert material; Perhaps direct metal lining nickel; At last after nickel plating or copper facing, be anode with pure iron and pure nickel or iron-nickel alloy again, be negative electrode with the material of handling, under direct current or pulsed electrical, electroplate the Armco magnetic iron nickelalloy; Perhaps Direct Electroplating Armco magnetic iron nickelalloy.This step technique parameter is prior art.
Material of the present invention is all electroplated the Armco magnetic iron nickelalloy at last, and this is the important functional plating of this material, has guaranteed that this material has effectiveness of shielding preferably under the low frequency magnetic shielding.Thereby having been possessed, this material in than wider frequency, all has comparatively ideal shield effectiveness.
This multi-functional aluminum-base flexible shielding material that adopts technology of preparing of the present invention to obtain has following effect:
(1) this material has snappiness preferably;
(2) comprehensive shielded usefulness can reach more than the 80dB;
(3) since at the treated plating in aluminium surface metal, and covered flexible membrane, avoided the aluminium surface in environment, directly to be corroded, so this material ageing better, the assurance of the enduring quality of effectiveness of shielding;
(4) in addition, visible reflectance, the infrared reflectance on the bright aluminium surface of this material can reach more than 80%, thereby make this material have high-reflectivity at visible-range and infra-red range, and low emittance promptly can be used as metallic reflection type lagging material;
(5) simultaneously, the technology of the present invention is when making material reach very high comprehensive shielded usefulness, saved and utilized chemical plating method to plate loaded down with trivial details, the complicated electroless plating pre-treatment process and the electroless plating process of the production technology of layer of metal and then metal lining on the fabric, thereby simplification technological process, reduce cost, reduce and pollute.
Embodiment
Sample is according to the electron trade military standard SJ 20524-1995 of the People's Republic of China (PRC), utilizes device A gilent 4396B network analyzer and the coaxial test set of flange to record its comprehensive shielded usefulness.Utilize pHS-25 type pH meter test pH value.
1. the rolling aluminium foil with vinylformic acid transparent plastics adhesive tape sticking last layer 14 micron thickness is a base material, through ultrasonic oil removing, and oil removal treatment in alkaline wash again, washing, base material is put into the soda lye of pH=9 and is handled, and handles 150 seconds, gets rid of the oxide film on surface, washing, in the zincate solution of pH=14, handled 50 seconds then, thereby on the aluminium film, replace the last layer metallic zinc, stop the aluminium surface oxidation, then put into nickel-plating liquid and handle, at last deposited iron nickelalloy again.The comprehensive shielded usefulness that records sample reaches 84dB.The visible reflectance that records sample is 82%.
2. the evaporation layer of aluminum is a base material on the polyvinyl chloride transparent plastics film, through ultrasonic oil removing, and oil removal treatment in alkaline wash again, washing, base material is put into the soda lye of pH=13 and is handled, and handles 30 seconds, gets rid of the oxide film on surface, washing, in the heavy copper liquid of pH=10, handled 200 seconds then, thereby on the aluminium film, replace the last layer metallic copper, stop the aluminium surface oxidation, then put into the nickel-plating liquid electroplating processes, at last deposited iron nickelalloy again.The comprehensive shielded usefulness that records sample reaches 88dB.The visible reflectance that records sample is 84%.
3. the rolling aluminium foil with vinylformic acid transparent plastics adhesive tape sticking last layer 20 micron thickness is a base material, through ultrasonic oil removing, and oil removal treatment in alkaline wash again, washing, base material is put into the soda lye of pH=11 and is handled, and handles 90 seconds, gets rid of the oxide film on surface, washing, in the heavy nickel liquid of pH=12, handled 120 seconds then, thereby on the aluminium film, replace the last layer metallic nickel, stop the aluminium surface oxidation, then put into the copper plating bath electroplating processes, at last deposited iron nickelalloy again.This face of layer of iron-nickel alloy at sample is pasted transparent plastic film, and the transparent plastic film of that face of aluminium foil is torn the aluminium surface of recovering light.The comprehensive shielded usefulness that records sample reaches 92dB.The visible reflectance that records sample is 88%.The infrared reflectance that records sample light aluminium surface is 85%.The infrared emittance that records sample light aluminium surface is 0.05.
4. the rolling aluminium foil with 20 micron thickness is a base material, through ultrasonic oil removing, and oil removal treatment in alkaline wash again, washing, base material is put into the soda lye of pH=11 and is handled, and handles 120 seconds, gets rid of the oxide film on surface, washing, in the zincate solution of pH=13, handled 90 seconds then, thereby on the aluminium film, replace the last layer metallic zinc, stop the aluminium surface oxidation, then put into nickel-plating liquid and handle, at last deposited iron nickelalloy again.The comprehensive shielded usefulness that records sample reaches 88dB.
5. the rolling aluminium foil of pasting one deck 14 micron thickness on the terylene fabric is a base material, through ultrasonic oil removing, and oil removal treatment in alkaline wash again, washing, base material is put into the soda lye of pH=10 and is handled, and handles 120 seconds, gets rid of the oxide film on surface, washing, in the zincate solution of pH=11, handled 150 seconds then, thereby on the aluminium film, replace the last layer metallic zinc, stop the aluminium surface oxidation, then put into nickel-plating liquid and handle, at last deposited iron nickelalloy again.The comprehensive shielded usefulness that records sample reaches 82dB.
6. the evaporation layer of aluminum is a base material on the acrylic fabric, through ultrasonic oil removing, and oil removal treatment in alkaline wash again, washing, base material is put into the soda lye of pH=12 and is handled, and handles 90 seconds, gets rid of the oxide film on surface, washing, in the zincate solution of pH=13, handled 90 seconds then, thereby on the aluminium film, replace the last layer metallic zinc, stop the aluminium surface oxidation, then put into nickel-plating liquid and handle, at last deposited iron nickelalloy again.The comprehensive shielded usefulness that records sample reaches 81dB.
7. the rolling aluminium foil of pasting one deck 14 micron thickness on SBS pitch prill flexible mat is a base material, through ultrasonic oil removing, and oil removal treatment in alkaline wash again, washing, base material is put into the soda lye of pH=11 and is handled, and handles 90 seconds, gets rid of the oxide film on surface, washing, in the zincate solution of pH=13, handled 90 seconds then, thereby on the aluminium film, replace the last layer metallic zinc, stop the aluminium surface oxidation, then put into nickel-plating liquid and handle, at last deposited iron nickelalloy again.The comprehensive shielded usefulness that records sample reaches 85dB.
8. the evaporation layer of aluminum is a base material on SBS pitch prill flexible mat, through ultrasonic oil removing, and oil removal treatment in alkaline wash again, washing, base material is put into the soda lye of pH=12 and is handled, and handles 90 seconds, gets rid of the oxide film on surface, washing, in the zincate solution of pH=13, handled 120 seconds then, thereby on the aluminium film, replace the last layer metallic zinc, stop the aluminium surface oxidation, then put into nickel-plating liquid and handle, at last deposited iron nickelalloy again.The comprehensive shielded usefulness that records sample reaches 85dB.
Claims (3)
1, a kind of multi-functional aluminum-base flexible shielding material technology of preparing is characterized in that it may further comprise the steps:
(1) evaporation layer of aluminum on the flexible materials or paste the rolling aluminium foil of one deck below 40 microns as base material or directly with the rolling aluminium foil below 40 microns as base material;
(2) above-mentioned base material is reached oil removal treatment after washing in alkaline wash by the ultrasonic oil removing of prior art;
(3) base material after the above-mentioned oil removing washing is put into soda lye and handle, remove the oxide film after washing on surface;
(4) base material after the washing of above-mentioned removal surface film oxide is handled or put into the heavy copper liquid of alkalescence and handle or put into the heavy nickel liquid of alkalescence and handle soaking zinc, at its aluminium film upper surface displacement last layer metallic membrane after washing;
(5) material after the above-mentioned displacement last layer metallic membrane washing being put into copper plating bath handles, putting into nickel-plating liquid again handles, or directly put into nickel-plating liquid and handle, then after copper plating bath or nickel-plating liquid processing, the electroplating iron-nickel magneticalloy, or the Direct Electroplating Anhyster, washing has obtained multi-functional aluminum-base flexible matrix material then.
2, multi-functional aluminum-base flexible Composite Preparation technology according to claim 1 is characterized in that, in the step (3) base material after the oil removing washing is put into the soda lye of pH=9～13, and the treatment time is 30～150 seconds.
3, multi-functional aluminum-base flexible Composite Preparation technology according to claim 1, it is characterized in that, the base material of removing in the step (4) after the surface film oxide washing is handled or is put into the heavy copper liquid of alkalescence and handle or put into the heavy nickel liquid of alkalescence and handle soaking zinc, remove base material treatment soln pH=10～14 when its surface replacement last layer metallic membrane after surface film oxide is washed, the treatment time is 50～200 seconds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310102245 CN1234910C (en) | 2003-10-29 | 2003-10-29 | Technique for producing multifunctional aluminum base flexible shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310102245 CN1234910C (en) | 2003-10-29 | 2003-10-29 | Technique for producing multifunctional aluminum base flexible shielding material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1540035A true CN1540035A (en) | 2004-10-27 |
| CN1234910C CN1234910C (en) | 2006-01-04 |
Family
ID=34333147
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310102245 Expired - Lifetime CN1234910C (en) | 2003-10-29 | 2003-10-29 | Technique for producing multifunctional aluminum base flexible shielding material |
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| Country | Link |
|---|---|
| CN (1) | CN1234910C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459237C (en) * | 2005-07-25 | 2009-02-04 | 万向电动汽车有限公司 | Technique for cleaning copper-aluminium net |
| CN101161360B (en) * | 2006-10-11 | 2010-05-12 | 万向电动汽车有限公司 | Method for cleaning polyalcohol lithium ion battery afflux liquid |
| CN102595783A (en) * | 2011-07-27 | 2012-07-18 | 田茂福 | Novel LED circuit board and method |
| CN103171184A (en) * | 2011-12-20 | 2013-06-26 | 北京有色金属研究总院 | Low frequency strong magnetic field shield material |
| CN103898574A (en) * | 2012-12-24 | 2014-07-02 | 北京有色金属研究总院 | Electroplating Fe-Ni alloy magnetic shielding material and preparation method thereof |
| CN108811357A (en) * | 2018-07-04 | 2018-11-13 | 肇庆市创业帮信息技术有限公司 | A kind of PCB moves back film alkali cleaning equipment |
| CN109065360A (en) * | 2018-08-22 | 2018-12-21 | 哈尔滨工业大学 | A kind of preparation method of the electro-deposition permalloy film on aluminum matrix composite |
-
2003
- 2003-10-29 CN CN 200310102245 patent/CN1234910C/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100459237C (en) * | 2005-07-25 | 2009-02-04 | 万向电动汽车有限公司 | Technique for cleaning copper-aluminium net |
| CN101161360B (en) * | 2006-10-11 | 2010-05-12 | 万向电动汽车有限公司 | Method for cleaning polyalcohol lithium ion battery afflux liquid |
| CN102595783A (en) * | 2011-07-27 | 2012-07-18 | 田茂福 | Novel LED circuit board and method |
| CN103171184A (en) * | 2011-12-20 | 2013-06-26 | 北京有色金属研究总院 | Low frequency strong magnetic field shield material |
| CN103898574A (en) * | 2012-12-24 | 2014-07-02 | 北京有色金属研究总院 | Electroplating Fe-Ni alloy magnetic shielding material and preparation method thereof |
| CN108811357A (en) * | 2018-07-04 | 2018-11-13 | 肇庆市创业帮信息技术有限公司 | A kind of PCB moves back film alkali cleaning equipment |
| CN109065360A (en) * | 2018-08-22 | 2018-12-21 | 哈尔滨工业大学 | A kind of preparation method of the electro-deposition permalloy film on aluminum matrix composite |
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| Publication number | Publication date |
|---|---|
| CN1234910C (en) | 2006-01-04 |
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Granted publication date: 20060104 |